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SI units in brackets where applicable

Relevant constants also included

i = x direction component (vectors can be used for distance, velocity, acceleration, etc - use correct units)

j = y direction component

g = angle

|v| = magnitude of velocity (note, the |x| notation can be used for the magnitude of any vector)

Direction/magnitude to component:

i = |v| sin g

j = |v| cos g

Component to direction/magnitude:

|v| = SQRT(i^2 + j^2)

g = arctan (i/j)

s = distance (metres, m)

u = initial velocity (metres per second, ms^-1)

v = final velocity (metres per second, ms^-1)

a = acceleration (metres per second squared, ms^-2)

t = time (seconds, s)

Copyable text:

v = u + at

s = ut + (1/2)(a)(t^2)

s = vt - (1/2)(a)(t^2)

v^2 = u^2 + 2as

s = ((u + v)/2)t

f = force (Newtons, N)

m = invariant or basic mass (kilograms, kg)

M = "relativistic" mass (kilograms, kg) (note that this and subsequent equations using it aren't really technically correct, but make a simple approximation if you're not trying to be too rigorous)

a = acceleration

v = velocity

p = momentum (kilogram metres per second, kgms^-1)

c = speed of light, 3e8 ms^-1

γ = c / (SQRT (c^2 - |v|^2))

M = γm

f = Ma

p = Mv

G = Gravitational constant, 6.67e-11 N m^2 kg^-2 (don't worry about the units)

F = force

M = mass 1, generally the mass of the heavier object (kilograms, kg)

m = mass 2, generally the mass of the lighter object

s = distance

ω = angular velocity (radians per second, rad s^-1)

t = time

f = frequency (Hertz, Hz)

v = velocity

r = radius (metres, m)

F = (GMm)/(s^2)

ω = angle / t

ω = angle * f

v = r ω

a = r ω^2

a = (v^2) / r

a = v ω

F = mv ω

(GM)/(r) = (v^2)